Real Dictionary

reform
variable noun: Reform consists of changes and improvements to a law, social system, or institution. A reform is an instance of such a change or improvement.
verb: If someone reforms something such as a law, social system, or institution, they change or improve it.
verb: When someone reforms or when something reforms them, they stop doing things that society does not approve of, such as breaking the law or drinking too much alcohol.

reform in American English
to make better by removing faults and defects; correct
adjective: of, pertaining to, or characteristic of Reform Jews or Reform Judaism
intransitive verb: to abandon evil conduct or error
noun: the improvement or amendment of what is wrong, corrupt, unsatisfactory, etc.
transitive verb: to change to a better state, form, etc.; improve by alteration, substitution, abolition, etc.

reform in British English
noun: an improvement or change for the better, esp as a result of correction of legal or political abuses or malpractices
verb: to improve (an existing institution, law, practice, etc) by alteration or correction of abuses